David couldn't help himself from gushing over his son's sweet smile in his caption of a black-and-white pic of Cruz in a pool.

"Happy 11th birthday to our little man... 11 years of seeing him grow from a cheeky baby to a cheeky 11 year old," the former soccer pro, 40, wrote. "He makes us laugh every single day and has the most amazing character plus the biggest heart... Love you big boy."